The interview process is somewhat unpredictable.

There are multiple interviews, typically between three and five.

The interviews themselves have somewhat unpredictable content.

Some teams leave it up to the individual interviewer to determine what to ask. At the other end of the spectrum, some teams determine in advance what they want to assess and which interviewers will cover each area.

Some interviewers give algorithm and coding questions; others do just an algorithm or a coding question.

Some interviewers ask for past demonstrations of particular social skills.

Rotate a square image by pi/2 radians.